Unquoted operands

The assembler normally retains the case of unquoted macro operands. However, to maintain uppercase alphabetic character set compatibility with earlier assemblers, High Level Assembler provides the COMPAT(MACROCASE) assembler option. When you specify this option, the assembler internally converts lowercase alphabetic characters (a through z) in unquoted macro instruction operands to uppercase alphabetic characters (A though Z), before macro expansion begins.